US passengers each quarter across three and a half decades. The site's US demand models try to explain this series.
What this shows: The chart covers 1990 Q1 to 2025 Q4. It plots Passengers, 4-quarter rolling average and TSA nowcast on a vertical axis of Passengers (millions, quarterly). Latest values: Passengers 288.9; 4-quarter rolling average 275. Projected to 2025 Q4: TSA nowcast 279.3. Observed data run through 2025 Q3; the chart extends to 2025 Q4 with nowcast values.